Since version 1.3.2 the mobile (Android, iOS) version of the Camera Tools app supports the following keyboard shortcuts which can be used with a Bluetooth keyboard:

• R: start all cameras.
• S: stop all cameras.
• P: Power off all cameras.
• C: Connect to all cameras.
• T: Tag moment on all cameras.

Individual cameras can be controlled by first pressing the “CTRL” (command) key, for instance the following command starts recording on the 2nd camera:

CTRL + 2 + R